Remove testCompatCleanthat2Dot1

Author: Goooler

lib/build.gradle

@@ -33,13 +33,6 @@ for (glue in NEEDS_GLUE) {
 
 versionCompatibility {
 	adapters {
-		// (alphabetic order please)
-		namespaces.register('Cleanthat') {
-			versions = [
-				'2.1',
-			]
-			targetSourceSetName = 'cleanthat'
-		}
 		namespaces.register('KtLint') {
 			// as discussed at https://github.com/diffplug/spotless/pull/1475
 			// we will support no more than 2 breaking changes at a time = 3 incompatible versions
@@ -82,7 +75,6 @@ dependencies {
 	// cleanthat
 	String VER_CLEANTHAT='2.22'
 	cleanthatCompileOnly "io.github.solven-eu.cleanthat:java:$VER_CLEANTHAT"
-	compatCleanthat2Dot1CompileAndTestOnly "io.github.solven-eu.cleanthat:java:$VER_CLEANTHAT"
 	// diktat old supported version 1.x
 	compatDiktat1Dot2Dot5CompileOnly "org.cqfn.diktat:diktat-rules:1.2.5"
 	// diktat latest supported version 2.x